CA1082287A - Unitary ink jet and reservoir for x-y and strip chart process recorders and table top graphic instruments - Google Patents
Unitary ink jet and reservoir for x-y and strip chart process recorders and table top graphic instrumentsInfo
- Publication number
- CA1082287A CA1082287A CA275,403A CA275403A CA1082287A CA 1082287 A CA1082287 A CA 1082287A CA 275403 A CA275403 A CA 275403A CA 1082287 A CA1082287 A CA 1082287A
- Authority
- CA
- Canada
- Prior art keywords
- chamber
- ink
- opening
- conduit
- ink jet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
- G01D15/16—Recording elements transferring recording material, e.g. ink, to the recording surface
- G01D15/18—Nozzles emitting recording material
Abstract
Abstract An impulse ink jet mounted in an ink reservoir so as to be a self-contained writing device for X-Y and strip chart process recorders and table top graphic recorders, with the jet being associated with a length of energy absorbing conduit coiled within the reservoir so as to minimize the effects of acceleration on the ink; the conduit allowing the ink jet to achieve a flat response to the driving pulse rate through its full response range.
Description
This invention relates generally to ink jet writing devices and more particularly concerns an ink jet device suit-able for use with X-Y and strip char~ process recorders or - similar table top graphic instru~ents.
Non-contact writing devices which produce traces by ejecting droplets of ink against the medium being printed upon are well known as ink jets to the art. One class of such devices is the impulse ink jet in which ink droplets are ejected upon an electrical signal or at a rate dictated by a signal frequency. Devices of this kind are disclosed and claimed in United States patent No. 3,683,212 issued August 8, 1972, and its related divisional patents ~osO 3,840,758 - 3,857,049 and 3,902,083.
Adapting an ink jet writing device for the moving - writing head of an X-Y recorder type of instrurnent involves some ~pecial problems arising from the need to feed ink to the ink jet without visually obscuring the recording paper and without interfering with the mechanism for driving the writing device along the two controlled axes. Moreover, modern X-Y recorders are capable of high speed response so that the writing device must function properly under high acceleration and deceleration forcesO In the case of an impulse ink jet device, such acceleration forces should not cause ink to be thrown when there is no command signal.
Impulse ink jets embody another problem whose solution creates a further difficulty in adopting such devices to an X-Y
recorder. ~o prevent pressure pul~e reflections from interfer-ing with subsequent ink droplet formation, and thus insure that a single uniform droplet is generated by each impulse signal through the full response range, an energy absorbing visco-elastic conduit can be associated with the droplet forming tube ;; as taught in United States Patent ~o. 3,832,579, iqsued Augu~t 27, 1974.
. .. . .
.. ~ .
O~Z2~
;
Although the conduit and the droplet forming tube are i of capillary diameters, a relatively appreciable length of conduit, on the order of six inches, is utilized to prevent pulse reflections, By so providing uniform droplets regardless of frequency, the forming of uniform traces through proper frequency modulation is facilitated. Such frequency modulation is disclosed and claimed in Canadian Patent Application Serial No. 267,497, filed December 9, 1976, Shou L. Hou et al, and assigned to the assignee of the present invention. Providing this structure within the space limitations, and subject to ;, . , r~,~ the operating forces, of an X-Y recorder presents a further problem of adapting an impluse ink jet writing device to this .:
~ application.
:., ~; .
It is the general aim of the invention to solve the rr above problems and provide an impulse ink jet writing device ;~ well suited for X-Y recorder type instruments.
In more detail, it is an object of the invention to ~ provide a writing device of the above character that is capable i-~ of functioning properly, including the maintaining of a ~lat `-~
frequency reqponse, when driven at high speed and subjected to ? ~" ~ .
r~, ~ 20 severe acceleration and deceleration shocks.
` A further object is to provide a device of the above ;~ type which can be mounted for writing in a plane varying from f horizontal to vertical.
,.,1 Another object is to provide a device as described ~ above which is simple in design and hence economical to manu-; facture and maintain.
In accordance with the invention there is provided an ink jet writing device which comprises, in combina~ion, a . ~ .
housing defining a cylindrical chamber adapted to ~e mounted for movement perpendicularly to the axis of said chamber, a tubular shroud fixed substantially on the center line of the chamber and `~ defining an opening from the chamber, an ink jet assembly is ~ r~
.,~, .
~ - 2 -.
. .
fixed in the opening and includes an orifice defining member and a transducer for expelling droplets of ink from the member through the orifice, a viscoelastic conduit opening to the member, runs through the shroud and has a length coiled within the chamber, and means for opening the chamber so as to supply the chamber with ink.
In one particular embodiment the opening i5 in th0 bottom of the chamber and the shroud extends from the opening to a point close to the top end of the chamber, and the conduit length extends vertically through the shroud and is coiled helically from near the top of the chamber down to near the bottom of the chamber~ The device may also include a resilient band compressed within the coils o~ the conduit and biasing the coils outwardly against the walls of said chamber.
In yet another embodiment the chamber is air vented ; at a point toward one lateral edge so as to avoid ink leakage through the vent and permit the device to write in a vertical plane by rotating the device ~o that the vent is near the upper-i most part of the assembly.
Other objects and advantages of the invention will be apparent upon reading the following detailed description and upon reference to the drawings, in which:
~ 3 -,~ ' . . . . .
., .
~L~8:~Z~7 Figure ] is a fragmelltary perspectivc of an X~~ recordi]lcJ - -instrument embodying the writincJ dcvice oE the invention;
Fig. 2 is an enlarged fraymentary section of the ink je~
device shown in Fig. l;
Fig. 3 is a greatly enlarged ver-tical section of the device shown in Fig. l;
Fig. 4 is a further enlarged fragmentary section of the nozzle portion of the ink jet shown in Fig. 3; and ; Fig. 5 is a fragmentary section showing an alternate embodiment for the cover air vent shown in Fig. 2.
' While the invention will be described in connection with certain preferred embodiments, it will be understood that we do not intend to limit the invention to those embodiments. On the contrary, we intend to cover all alternatives, modifications and' equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
}~ Turning to the drawings, there is shown in Fig. 1 the ' ' writing table of an X-Y recorder 10 on which a sheet of recording paper 11 is fixed. A writing device 12 embodying the invention ;s mounted on a head 13 that can be driven along an axis bar 14. The , .
bar 14, in turn, is mounted for movement perpendicular to its length over the table and thus the paper 11. The device 12 is positioned to trace a line on the paper as the bar 14 moves, and as the head 13 moves on the bar. As those'familiar with this art will appreciate, a signal having two X-Y components is plotted by the recorder 10 by having one component drive the bar 14 and the other component drive the head'13 on the bar.
The writing device 12 is of the kind shown in patent No. 3,6~3,212, referred to above, and includes an orificc defilling member 21 in the form oE a glass tube with a necked down lower end 22 surrounded by a piezoelectric transducer 23 that, whe1l energi~ed by an elec-trica:l pulse transmittcd by leads 24, e-jects , ' ~ . , ~: `\
!32Z~
a droplet of ink from the orifice at the lower tube end 22. sy ejecting ink droplets at a rate proportional to the movement of - the device 12 over the paper 11, a continuous uniform line is traced. Systemsfor so modulating the ink droplet ejection rate are shown in the aforementioned Canadian Patent Application S.~. 267,497. The tube and transducer are fixed in a cylind-rical shroud 25 by putting material such as a silicone poly-mer 26, and the tube 21 is held perpendicular to the plane of movement of the device 12 by the shroud 25 being fixed in a 10 housing 27 that, in turn, is fixed in the head 13. The hous-ing 27 serves a& an ink re~3ervoir for the writing device 12.
To prevent ink creeping ~rom the jet orifice at the lower tube end 22, in the event that a positive pressure is developed in the housing 27, the end 22 is coated with an anti-; wetting material 28 (see Fig. 4) such as tetrafluor,oethylene.
To give a clearer understanding of the representative ~.
e~bodiment and the problems involved, a modern X-Y recorder is capable of driving its writing head at speeds of up to 50 - -inches per ~qecond, with acceleration forces being generated of 20 up to 10 G's. In a practical e~ibodiment, the orifice of the writing tube 21 is approximately 2-3 mils in diameter, and the diameter of the hou~ing 27 is only approximately 1/2 inch. One potential problem is avoided by holding the tube 21 perpendi-cular to its direction of movement, so that the high accele-ration force~ will not act to throw ink in the tube through the droplet forming orifice.
In accordance with the invention, the housing 27 de-fines a cylindrical chamber 31 containing ink, and a visco-elastic conduit 32 is connected to be open to the tube 21, is 30 run up through the shroud 25, and is coiled within and against , the walls ' ' ' ,. ,~.~
, -Z~7 of the chamber 31. Preerably, tlle conduit is on -thc ordc~ of six inches lony so as to follow the teachillgs of paten-t No. 3,832,579 referred to ~bove. The chamber is closed by a sealing cover 33 includiny an annular seal 34 to prevent ink leakage and an air vent 37 to prevent vacuum blocking of ink f1QW
through the device 12. The ven-t 37 is a plug of air porous, non-wetting plastic such as tetrafluorethylene. I'he conduit 32 is of capillary size and coiled helically from near the top of the chamber 31 down to the chamber bottom so that the conduit open end 38 will be near the lowest point of the ink supply and ca1l therefore deliver virtually all of the ink in the chamber to the tube 21.
In order to restrain the conduit 32 and maintain its coiled shape against acceleration forces, a pair of resilient bands in the form of U-shaped springs 35 and 36 are compressed within the conduit coils so as to bias the coils outwardly against the cylindrical wall of the chamber 31, thus maintaining the helical configuration of the conduit 32 even under acceleration forces.
The springs 35, 36 are disposed at right angles -to one another.
Although a relatively appreciable length of conduit 32 is used -- appreciable with respect to the sizes of the associated parts -- because the conduit is coiled on a uniform diameter, acceleration forces on the ink in the conduit, no matter in what ; direction those forces are acting, are essentially balanced, except for a short length of conduit 32a extending almost radially from the shroud 25 to the wall of the chamber 31. In the illustrated embodiment, the length of the conduit portion 32a is only about 1/4 inch. It can be calculated that with an orifice of 2 mils in the tube 21, the ink meniscus at the oriice coulc1 support an ink column in the tube 21 and associated conclll:it 32 o .
215~7 -, the order of abou-t 15 inCIleS . 'l`his means that the d~v:icc ]2, w~
an unbalanced length of ink carrying condui.t of only approY.imat(Ly . ., ~
inch, could theoretically withstand acceleration forces of 60 G without throwing ink -- well above the actual forces imposc~d by a typical X-Y recorder.
Preferably, the vent 37 is located towarcl one edge of the cover, at the right in Fig. 2, so that the vent will ~e near the uppermost part of the assembly upon rotation of the device 12 ; counterclockwise as seen in Fig. 2 through an angle o~ up to 90.
The device can therefore be positioned so as to write in planes varying from horizontal to vertical. An alternate form of vent is shown in Fig. 5 where parts similar to those previously descri~ed have been given the same reference numerals with the distinguishing suffix a added. Thus, a cover 33a for a housing 27a is provided with a vent 37a in the form of a short tube extending through the cover and having its lower end shielded by baffles including a cup-like member ~1 and a plate 42. The vent 37a is positioned, as ; was the vent 37, toward what would be the uppermost portion of the - assembly should the device 12 be rotated so as to write in a vertical plane.
It will now be apparent that the writing device 12 provides an ~-Y recorder with an extremely compact writing head that provides the recorder with all of the advantages of an impulse ~-jet writing device. Even though an ink reservoir is carried with and made a part of the writing device, the arrangement of parts is , ~"
such that acceleration forces do not affect the controlled ; generation of ink droplets. Those familiar with this art will also appreciate that the design is quite simple and strai~htforwal-d and hence economical to manufacture and maintain.
. .
.; . .
.- 7 ~ . . .
Non-contact writing devices which produce traces by ejecting droplets of ink against the medium being printed upon are well known as ink jets to the art. One class of such devices is the impulse ink jet in which ink droplets are ejected upon an electrical signal or at a rate dictated by a signal frequency. Devices of this kind are disclosed and claimed in United States patent No. 3,683,212 issued August 8, 1972, and its related divisional patents ~osO 3,840,758 - 3,857,049 and 3,902,083.
Adapting an ink jet writing device for the moving - writing head of an X-Y recorder type of instrurnent involves some ~pecial problems arising from the need to feed ink to the ink jet without visually obscuring the recording paper and without interfering with the mechanism for driving the writing device along the two controlled axes. Moreover, modern X-Y recorders are capable of high speed response so that the writing device must function properly under high acceleration and deceleration forcesO In the case of an impulse ink jet device, such acceleration forces should not cause ink to be thrown when there is no command signal.
Impulse ink jets embody another problem whose solution creates a further difficulty in adopting such devices to an X-Y
recorder. ~o prevent pressure pul~e reflections from interfer-ing with subsequent ink droplet formation, and thus insure that a single uniform droplet is generated by each impulse signal through the full response range, an energy absorbing visco-elastic conduit can be associated with the droplet forming tube ;; as taught in United States Patent ~o. 3,832,579, iqsued Augu~t 27, 1974.
. .. . .
.. ~ .
O~Z2~
;
Although the conduit and the droplet forming tube are i of capillary diameters, a relatively appreciable length of conduit, on the order of six inches, is utilized to prevent pulse reflections, By so providing uniform droplets regardless of frequency, the forming of uniform traces through proper frequency modulation is facilitated. Such frequency modulation is disclosed and claimed in Canadian Patent Application Serial No. 267,497, filed December 9, 1976, Shou L. Hou et al, and assigned to the assignee of the present invention. Providing this structure within the space limitations, and subject to ;, . , r~,~ the operating forces, of an X-Y recorder presents a further problem of adapting an impluse ink jet writing device to this .:
~ application.
:., ~; .
It is the general aim of the invention to solve the rr above problems and provide an impulse ink jet writing device ;~ well suited for X-Y recorder type instruments.
In more detail, it is an object of the invention to ~ provide a writing device of the above character that is capable i-~ of functioning properly, including the maintaining of a ~lat `-~
frequency reqponse, when driven at high speed and subjected to ? ~" ~ .
r~, ~ 20 severe acceleration and deceleration shocks.
` A further object is to provide a device of the above ;~ type which can be mounted for writing in a plane varying from f horizontal to vertical.
,.,1 Another object is to provide a device as described ~ above which is simple in design and hence economical to manu-; facture and maintain.
In accordance with the invention there is provided an ink jet writing device which comprises, in combina~ion, a . ~ .
housing defining a cylindrical chamber adapted to ~e mounted for movement perpendicularly to the axis of said chamber, a tubular shroud fixed substantially on the center line of the chamber and `~ defining an opening from the chamber, an ink jet assembly is ~ r~
.,~, .
~ - 2 -.
. .
fixed in the opening and includes an orifice defining member and a transducer for expelling droplets of ink from the member through the orifice, a viscoelastic conduit opening to the member, runs through the shroud and has a length coiled within the chamber, and means for opening the chamber so as to supply the chamber with ink.
In one particular embodiment the opening i5 in th0 bottom of the chamber and the shroud extends from the opening to a point close to the top end of the chamber, and the conduit length extends vertically through the shroud and is coiled helically from near the top of the chamber down to near the bottom of the chamber~ The device may also include a resilient band compressed within the coils o~ the conduit and biasing the coils outwardly against the walls of said chamber.
In yet another embodiment the chamber is air vented ; at a point toward one lateral edge so as to avoid ink leakage through the vent and permit the device to write in a vertical plane by rotating the device ~o that the vent is near the upper-i most part of the assembly.
Other objects and advantages of the invention will be apparent upon reading the following detailed description and upon reference to the drawings, in which:
~ 3 -,~ ' . . . . .
., .
~L~8:~Z~7 Figure ] is a fragmelltary perspectivc of an X~~ recordi]lcJ - -instrument embodying the writincJ dcvice oE the invention;
Fig. 2 is an enlarged fraymentary section of the ink je~
device shown in Fig. l;
Fig. 3 is a greatly enlarged ver-tical section of the device shown in Fig. l;
Fig. 4 is a further enlarged fragmentary section of the nozzle portion of the ink jet shown in Fig. 3; and ; Fig. 5 is a fragmentary section showing an alternate embodiment for the cover air vent shown in Fig. 2.
' While the invention will be described in connection with certain preferred embodiments, it will be understood that we do not intend to limit the invention to those embodiments. On the contrary, we intend to cover all alternatives, modifications and' equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
}~ Turning to the drawings, there is shown in Fig. 1 the ' ' writing table of an X-Y recorder 10 on which a sheet of recording paper 11 is fixed. A writing device 12 embodying the invention ;s mounted on a head 13 that can be driven along an axis bar 14. The , .
bar 14, in turn, is mounted for movement perpendicular to its length over the table and thus the paper 11. The device 12 is positioned to trace a line on the paper as the bar 14 moves, and as the head 13 moves on the bar. As those'familiar with this art will appreciate, a signal having two X-Y components is plotted by the recorder 10 by having one component drive the bar 14 and the other component drive the head'13 on the bar.
The writing device 12 is of the kind shown in patent No. 3,6~3,212, referred to above, and includes an orificc defilling member 21 in the form oE a glass tube with a necked down lower end 22 surrounded by a piezoelectric transducer 23 that, whe1l energi~ed by an elec-trica:l pulse transmittcd by leads 24, e-jects , ' ~ . , ~: `\
!32Z~
a droplet of ink from the orifice at the lower tube end 22. sy ejecting ink droplets at a rate proportional to the movement of - the device 12 over the paper 11, a continuous uniform line is traced. Systemsfor so modulating the ink droplet ejection rate are shown in the aforementioned Canadian Patent Application S.~. 267,497. The tube and transducer are fixed in a cylind-rical shroud 25 by putting material such as a silicone poly-mer 26, and the tube 21 is held perpendicular to the plane of movement of the device 12 by the shroud 25 being fixed in a 10 housing 27 that, in turn, is fixed in the head 13. The hous-ing 27 serves a& an ink re~3ervoir for the writing device 12.
To prevent ink creeping ~rom the jet orifice at the lower tube end 22, in the event that a positive pressure is developed in the housing 27, the end 22 is coated with an anti-; wetting material 28 (see Fig. 4) such as tetrafluor,oethylene.
To give a clearer understanding of the representative ~.
e~bodiment and the problems involved, a modern X-Y recorder is capable of driving its writing head at speeds of up to 50 - -inches per ~qecond, with acceleration forces being generated of 20 up to 10 G's. In a practical e~ibodiment, the orifice of the writing tube 21 is approximately 2-3 mils in diameter, and the diameter of the hou~ing 27 is only approximately 1/2 inch. One potential problem is avoided by holding the tube 21 perpendi-cular to its direction of movement, so that the high accele-ration force~ will not act to throw ink in the tube through the droplet forming orifice.
In accordance with the invention, the housing 27 de-fines a cylindrical chamber 31 containing ink, and a visco-elastic conduit 32 is connected to be open to the tube 21, is 30 run up through the shroud 25, and is coiled within and against , the walls ' ' ' ,. ,~.~
, -Z~7 of the chamber 31. Preerably, tlle conduit is on -thc ordc~ of six inches lony so as to follow the teachillgs of paten-t No. 3,832,579 referred to ~bove. The chamber is closed by a sealing cover 33 includiny an annular seal 34 to prevent ink leakage and an air vent 37 to prevent vacuum blocking of ink f1QW
through the device 12. The ven-t 37 is a plug of air porous, non-wetting plastic such as tetrafluorethylene. I'he conduit 32 is of capillary size and coiled helically from near the top of the chamber 31 down to the chamber bottom so that the conduit open end 38 will be near the lowest point of the ink supply and ca1l therefore deliver virtually all of the ink in the chamber to the tube 21.
In order to restrain the conduit 32 and maintain its coiled shape against acceleration forces, a pair of resilient bands in the form of U-shaped springs 35 and 36 are compressed within the conduit coils so as to bias the coils outwardly against the cylindrical wall of the chamber 31, thus maintaining the helical configuration of the conduit 32 even under acceleration forces.
The springs 35, 36 are disposed at right angles -to one another.
Although a relatively appreciable length of conduit 32 is used -- appreciable with respect to the sizes of the associated parts -- because the conduit is coiled on a uniform diameter, acceleration forces on the ink in the conduit, no matter in what ; direction those forces are acting, are essentially balanced, except for a short length of conduit 32a extending almost radially from the shroud 25 to the wall of the chamber 31. In the illustrated embodiment, the length of the conduit portion 32a is only about 1/4 inch. It can be calculated that with an orifice of 2 mils in the tube 21, the ink meniscus at the oriice coulc1 support an ink column in the tube 21 and associated conclll:it 32 o .
215~7 -, the order of abou-t 15 inCIleS . 'l`his means that the d~v:icc ]2, w~
an unbalanced length of ink carrying condui.t of only approY.imat(Ly . ., ~
inch, could theoretically withstand acceleration forces of 60 G without throwing ink -- well above the actual forces imposc~d by a typical X-Y recorder.
Preferably, the vent 37 is located towarcl one edge of the cover, at the right in Fig. 2, so that the vent will ~e near the uppermost part of the assembly upon rotation of the device 12 ; counterclockwise as seen in Fig. 2 through an angle o~ up to 90.
The device can therefore be positioned so as to write in planes varying from horizontal to vertical. An alternate form of vent is shown in Fig. 5 where parts similar to those previously descri~ed have been given the same reference numerals with the distinguishing suffix a added. Thus, a cover 33a for a housing 27a is provided with a vent 37a in the form of a short tube extending through the cover and having its lower end shielded by baffles including a cup-like member ~1 and a plate 42. The vent 37a is positioned, as ; was the vent 37, toward what would be the uppermost portion of the - assembly should the device 12 be rotated so as to write in a vertical plane.
It will now be apparent that the writing device 12 provides an ~-Y recorder with an extremely compact writing head that provides the recorder with all of the advantages of an impulse ~-jet writing device. Even though an ink reservoir is carried with and made a part of the writing device, the arrangement of parts is , ~"
such that acceleration forces do not affect the controlled ; generation of ink droplets. Those familiar with this art will also appreciate that the design is quite simple and strai~htforwal-d and hence economical to manufacture and maintain.
. .
.; . .
.- 7 ~ . . .
Claims (4)
1. An ink jet writing device comprising, in combination a housing defining a cylindrical chamber adapted to be mounted for movement perpendicularly to the axis of said chamber, a tubular shroud fixed substantially on the center line of said chamber and defining an opening from the chamber, an ink jet assembly fixed in said opening and including an orifice defining member and a transducer for expelling droplets of ink from said member through said orifice, a viscoelastic conduit opening to said member, running through said shroud and having a length coiled within said chamber, and means for opening said chamber so as to supply the chamber with ink.
2. The combination of claim 1, in which said opening is in the bottom of said chamber and said shroud extends from said opening to a point close to the top end of said chamber, and said conduit length extends vertically through said shroud and is coiled helically from near the top of the chamber down to near the bottom of the chamber.
3. The combination of claim 1, including a resilient band compressed within the coils of said conduit and biasing said coils outwardly against the walls of said chamber.
4. The combination of claim 1, in which said chamber is air vented at a point toward one lateral edge so as to avoid ink leakage through the vent and permit the device to write in a vertical plane by rotating the device so that the vent is near the uppermost part of the assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US678,062 | 1976-04-19 | ||
| US05/678,062 US4025928A (en) | 1976-04-19 | 1976-04-19 | Unitary ink jet and reservoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1082287A true CA1082287A (en) | 1980-07-22 |
Family
ID=24721221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA275,403A Expired CA1082287A (en) | 1976-04-19 | 1977-03-31 | Unitary ink jet and reservoir for x-y and strip chart process recorders and table top graphic instruments |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4025928A (en) |
| JP (1) | JPS52128166A (en) |
| CA (1) | CA1082287A (en) |
| DE (1) | DE2708924C2 (en) |
| FR (1) | FR2349130A1 (en) |
| GB (1) | GB1562151A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5633366Y2 (en) * | 1978-08-29 | 1981-08-07 | ||
| US4306245A (en) * | 1978-09-21 | 1981-12-15 | Canon Kabushiki Kaisha | Liquid jet device with cleaning protective means |
| JPS5845743Y2 (en) * | 1979-01-30 | 1983-10-18 | 和子 吉原 | Net for ball games |
| JPS55126461A (en) * | 1979-03-26 | 1980-09-30 | Canon Inc | Cartridge-type recording head |
| US4243995A (en) * | 1979-06-01 | 1981-01-06 | Xerox Corporation | Encapsulated piezoelectric pressure pulse drop ejector apparatus |
| JPS5638269A (en) * | 1979-09-05 | 1981-04-13 | Ricoh Co Ltd | Deaerator in ink supply system of ink jet recorder |
| JPS56105984A (en) * | 1980-01-28 | 1981-08-22 | Canon Inc | Ink container of recording device |
| JPS56129189A (en) * | 1980-03-14 | 1981-10-09 | Canon Inc | Container for ink |
| JPS56143047U (en) * | 1980-03-27 | 1981-10-28 | ||
| EP0185652B1 (en) * | 1981-08-04 | 1989-05-24 | Ing. C. Olivetti & C., S.p.A. | Ink jet dot printing head |
| JPS5836457A (en) * | 1981-08-25 | 1983-03-03 | Seiko Epson Corp | Ink jet head pump |
| JPS58107399A (en) * | 1981-12-22 | 1983-06-27 | キヤノン株式会社 | Ink jet pen |
| US4484202A (en) * | 1982-09-13 | 1984-11-20 | Ncr Corporation | Coiled conduits within ink jet reservoir |
| US4500895A (en) * | 1983-05-02 | 1985-02-19 | Hewlett-Packard Company | Disposable ink jet head |
| US5070347A (en) * | 1983-12-16 | 1991-12-03 | Sharp Kabushiki Kaisha | Cylindrical wall member for ink liquid resevoir mounted on a carriage in an ink jet system printer |
| JPS60101143U (en) * | 1983-12-16 | 1985-07-10 | シャープ株式会社 | Inkjet printer ink supply device |
| JPS6068959A (en) * | 1984-07-31 | 1985-04-19 | Seiko Epson Corp | Ink container for inkjet printer |
| US4769658A (en) * | 1986-09-16 | 1988-09-06 | Matsushita Electric Industrial Co., Ltd. | Ink jet recording apparatus with pressure adjustable mechanisms for discharging a constant ink amount |
| US4761658A (en) * | 1987-01-28 | 1988-08-02 | Georgis Nicholas J | Method and apparatus for measuring experimental quantities using an ink jet impactless timing device |
| US4900379A (en) * | 1988-05-20 | 1990-02-13 | The Boeing Company | Method for producing composite materials |
| US5182581A (en) * | 1988-07-26 | 1993-01-26 | Canon Kabushiki Kaisha | Ink jet recording unit having an ink tank section containing porous material and a recording head section |
| US5721577A (en) * | 1995-05-04 | 1998-02-24 | Calcomp Inc. | Large capacity ink cartridge |
| KR0165339B1 (en) * | 1995-12-30 | 1999-05-01 | 김광호 | A printer |
| US5901425A (en) * | 1996-08-27 | 1999-05-11 | Topaz Technologies Inc. | Inkjet print head apparatus |
| JP3613307B2 (en) * | 1997-01-24 | 2005-01-26 | セイコーエプソン株式会社 | Method of eliminating bubbles in ink supply path of ink jet recording apparatus and ink jet recording apparatus suitable for the same |
| KR100209516B1 (en) * | 1997-02-05 | 1999-07-15 | 윤종용 | Ink containing apparatus and method of ink jet print head |
| WO2005096720A2 (en) * | 2004-03-29 | 2005-10-20 | Waters Investments Limited | A capillar emitter for electrospray mass spectrometry |
| US20080129810A1 (en) * | 2006-12-01 | 2008-06-05 | Illinois Tool Works, Inc. | Compliant chamber with check valve and internal energy absorbing element for inkjet printhead |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2678633A (en) * | 1951-02-06 | 1954-05-18 | Decca Record Co Ltd | Writing instrument |
| US3120214A (en) * | 1962-03-08 | 1964-02-04 | Milgo Electronic Corp | Ink reservoir and recording apparatus |
| US3683212A (en) * | 1970-09-09 | 1972-08-08 | Clevite Corp | Pulsed droplet ejecting system |
| GB1356742A (en) * | 1971-05-21 | 1974-06-12 | Hitachi Ltd | Pen recorder |
| US3823409A (en) * | 1973-01-30 | 1974-07-09 | Rca Corp | Rotatable paraboloidal reservoir useful in an ink jet printer |
| US3832579A (en) * | 1973-02-07 | 1974-08-27 | Gould Inc | Pulsed droplet ejecting system |
-
1976
- 1976-04-19 US US05/678,062 patent/US4025928A/en not_active Expired - Lifetime
-
1977
- 1977-02-11 GB GB5908/77A patent/GB1562151A/en not_active Expired
- 1977-03-02 DE DE2708924A patent/DE2708924C2/en not_active Expired
- 1977-03-23 FR FR7708665A patent/FR2349130A1/en active Granted
- 1977-03-29 JP JP3513977A patent/JPS52128166A/en active Granted
- 1977-03-31 CA CA275,403A patent/CA1082287A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52128166A (en) | 1977-10-27 |
| DE2708924A1 (en) | 1977-11-03 |
| FR2349130A1 (en) | 1977-11-18 |
| US4025928A (en) | 1977-05-24 |
| FR2349130B1 (en) | 1984-09-14 |
| GB1562151A (en) | 1980-03-05 |
| DE2708924C2 (en) | 1982-10-28 |
| JPS5619887B2 (en) | 1981-05-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |